The pass-through SQL feature allows an application developer to send a statement directly to a non-Oracle system without being interpreted by the Oracle server. This can be useful if the non-Oracle system allows for operations in statements for which there is no equivalent in Oracle.

You can run these statements directly at the non-Oracle system using the PL/SQL package DBMS_HS_PASSTHROUGH. Any statement executed with this package is run in the same transaction as regular "transparent" SQL statements.